No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha throu
No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader.
- Published
- May 21, 2018
- Updated
- Jun 16, 2026
- EPSS
- 8.5% · 95th percentile
- CWE
- CWE-862
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Report tools
Action score
33
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 8.5%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apache | zookeeper | cpe:2.3:a:apache:zookeeper |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| oracle | goldengate stream analytics | cpe:2.3:a:oracle:goldengate_stream_analytics |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache zookeeperbefore 3.4.10
- apache zookeeper3.5.0 and later · up to 3.5.3 inclusive
- apache zookeeper3.5.0
- apache zookeeper3.5.3
- debian debian linux8.0
- debian debian linux9.0
- oracle goldengate stream analyticsbefore 19.1.0.0.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.
Apache Software Foundation Apache ZooKeeper
- Apache ZooKeeper prior to 3.4.10, Apache ZooKeeper 3.5.0-alpha through 3.5.3-betaaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | zookeeper | before 3.4.10-2 | 3.4.10-2 |
| Debian:8 | zookeeper | before 3.4.9-3+deb8u1 | 3.4.9-3+deb8u1 |
| Debian:9 | zookeeper | before 3.4.9-3+deb9u1 | 3.4.9-3+deb9u1 |
| Maven | org.apache.zookeeper:zookeeper | from 3.5.0-alpha · before 3.5.4-beta | 3.5.4-beta |
| Maven | org.apache.zookeeper:zookeeper | before 3.4.10 | 3.4.10 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-5637Two four letter word commands "wchp/wchc" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, w52Plan
- CVE-2023-44981Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication37Monitor
- CVE-2024-51504Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server36Monitor
- CVE-2016-5017Buffer overflow in the C cli shell in Apache Zookeeper before 3.4.9 and 3.5.x before 3.5.3, when using the "cmd:" batch mode syntax, allows 34Monitor
- CVE-2026-79993Apache ZooKeeper: Missing ACL check on deleteContainer opcode allows unauthorized deletion of any empty persistent/container znode30Monitor
- CVE-2026-59969Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:zookeeper | 3.4.10-2 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.zookeeper:zookeeper | 3.4.10 | Package registry (OSV) |
| Maven:org.apache.zookeeper:zookeeper | 3.5.4-beta | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-862 · Missing AuthorizationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.securityfocus.com/bid/104253
- www.securitytracker.com/id/1040948
- lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E
- lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E
- lists.apache.org/thread.html/c75147028c1c79bdebd4f8fa5db2b77da85de2b05ecc0d54d708b393%40%3Cdev.zookeeper.apache.org%3E
- lists.apache.org/thread.html/r73daf1fc5d85677d9a854707e1908d14e174b7bbb0c603709c0ab33f%40%3Coak-commits.jackrabbit.apache.org%3E
- lists.apache.org/thread.html/r8f0d920805af93033c488af89104e2d682662bacfb8406db865d5e14%40%3Cdev.jackrabbit.apache.org%3E
- lists.apache.org/thread.html/rc5bc4ddb0deabf8cfb69378cecee56fcdc76929bea9e6373cb863870%40%3Cdev.jackrabbit.apache.org%3E
- lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E
- lists.apache.org/thread.html/re3a4048e9515d4afea416df907a612ed384a16c57cf99e97ee4a12f2%40%3Cdev.jackrabbit.apache.org%3E
- www.debian.org/security/2018/dsa-4214
- www.oracle.com/security-alerts/cpujul2020.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.